German iris (Iris germanica): traditional uses, phytochemistry, how the dried and cured rhizome is prepared, safety precautions and contraindications.

Quaking aspen (Populus tremuloides): learn about the traditional uses of its salicin-rich bark, preparation, herbal pairings and contraindications.

Black horehound (Ballota nigra): traditional calming and digestive uses, preparation forms, recipes, drug interactions and contraindications in pregnancy.

Purple pitcher plant (Sarracenia purpurea): traditional uses of this carnivorous plant, preparation methods, laboratory studies and contraindications.

Sea holly (Eryngium maritimum): traditional uses as a diuretic and expectorant, preparation methods, recipes, contraindications and safety precautions.